I am also a regular Plasma donor, In New Zealand, it USED to be 4 Months stand down period after piercing, It is now 6 Months.
This was the old blurb
I actually donated just over 2 weeks ago and happened to take a photo of the new stand down period
Here is a thread that may be of interest
There are also other blood donation mentions in the forum
heres another, sorta kinda relevent
and some random posts ( from this one down for a little bit )
Any way, your decision, but I know what I would do in your situation.